基于双阵元超声波接收阵列的风矢量测量

针对当前超声波测风仪测量精度不高及抑制噪声干扰能力不强的问题,提出了一种双阵元超声波接收阵列结构及基于该结构的风矢量测量方法.首先,设计了一种基于超声波测风原理的风速风向测量系统结构,该结构中包含一个超声波发射阵元和两个超声波接收阵元;然后,依据该系统结构给出了一种基于相关方法的超声波时延估计算法,根据超声波传输时间与...

Wind vector measurement using dual sensors ultrasonic receiving array

To improve the property of measuring accuracy and noise suppression of the current ultrasonic anemoscope, a measurement method of wind vector is proposed, which is based on the structure of ultrasonic receiving array with dual sensors. Firstly, a structure of wind speed and direction measurement system is designed by using the principle of ultrasonic wind measurement. It consists of an ultrasonic transmitting sensor and two ultrasonic receiving sensors. Then, an ultrasonic time delay estimation algorithm based on the correlation detection is proposed. The wind speed and direction can be obtained directly via the relation between ultrasonic transmission time and wind vector. Finally, the feasibility and effectiveness of the proposed method are evaluated by several simulation experiments. The actual measured data are also utilized through establishing a wind measurement system with dual-sensor ultrasonic array. Experimental results show that the proposed method has the advantages of simple structure, stable algorithm, low computational complexity and good noise suppression performance. The practical test experiments show that the maximum relative error of wind speed measurement is 2. 3% , and the maximum error of wind direction angle measurement is -1. 5°. The technical requirements of wind vector measuring instrument can be meet basically.